We have two cats, one very confident little one, one very anxious big one. They get on well. The big one is destructive, scratches furniture, walls, doors etc.I can live with that. But he also pees on the carpet, and makes the house smell.
His two favourite spots are the door mat, and behind the settee.
He is neutered. I have tried feliway, I have tried all those enzyme cleaners, and the smell that is supposed to deter them, I have tried putting an extra litter tray behind the settee, ( he doesn't use it, still pees on the carpet.) I have tried a wide variety of different litter trays with different litter all over the house, where he happily craps. He is an indoor cat, and scared to go outside. I have a stack of cheap doormats, and regularly replace them, and have even put them behind the sofa too, but he won't pee on them behind the sofa, just pees next to them!
This doesn't happen all the time, but once or twice a week.
What haven't I tried?